Distance From Denver ARTCC Heliport to Jeju International Airport

The distance from Denver ARTCC Heliport () to Jeju International Airport (CJU) is 6374 miles or 10257 kilometers or 5535 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Longmont ( United States ) to Jeju City ( South Korea )?

A one-way nonstop (direct) flight between Longmont and Jeju City takes around 14 hours 39 minutes.

Estimated flight time from Denver ARTCC Heliport, Longmont, United States to Jeju International Airport, Jeju City, South Korea is 14 hours 39 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • - CJU

Kilometers		10257 km
Statute Miles		6374 miles
Nautical Miles		5535 nm
Avg. Time of Flight		14 hours 39 minutes

Denver ARTCC Heliport to Jeju International Airport Flight Route Map - to CJU Flight Path

Location of Denver ARTCC Heliport & Jeju International Airport is given below.
Click the map to view Longmont to Jeju City nonstop flight path and travel direction.

Click to see flight route on Google Map between Longmont, United States and Jeju City, South Korea. .

Nonstop flight route between Longmont, United States and Jeju City, South Korea.

Time Difference Between the Airports • - CJU

Time difference between Longmont (United States) and Jeju City (South Korea) is 15 Hours.
Jeju City time is 15 Hours ahead of Longmont.

Location	Local Time
Longmont (United States)	2026-06-23, 08:19:22 MDT
Jeju City (South Korea)	2026-06-23, 23:19:22 KST

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Denver ARTCC Heliport ( / CO99) Longmont, United States

Destination

Jeju International Airport (CJU / RKPC) Jeju City, South Korea